I avoid cold and flu by taking vitamin D supplements. It works a charm. :)
Excerpt from British Medical Journal - Heartburn drugs may raise risk of pneumonia...
"The link with pneumonia isn't as far-fetched as it might sound. By lowering acidity in the stomach, these drugs may encourage bacteria to grow in the stomach and oesophagus. The bacteria might then get into the lungs, causing pneumonia.
To learn more, researchers have now gathered the best studies looking at acid-suppressing drugs and pneumonia. They pooled the results of these studies to see what conclusions they could draw from this larger body of research.
What does the new study say?
Overall, people taking acid-suppressing drugs were between 22 percent and 27 percent more likely to get pneumonia than people not taking these treatments. The researchers estimated that for every 200 people taking one of these drugs, one extra person would develop pneumonia.
They also found that the risk of pneumonia seemed to rise with higher doses. And the risk was highest when people first started taking these drugs."
Coughing is one of the side effects of omeprazole.
Did this cough begin when he began taking the medication?
It may be worth talking to your doctor about this with a consideration of taking your son off the omeprazole.
Stomach pains in children can be from thread worms or from their stomach glands becoming swollen by bacterial or viral infections (mesenteric adenitis). Sometimes they cannot pin point where the pain is and point to the stomach when in fact it can be somewhere else, like a sore throat or a headache.
When he passes his stools, observe these to see if there are any white thread like worms present. Another sign is if you see your son scratch his bottom.
You can get medication for threadworms from the pharmacist or from the doctor if it is found that he has a worm infestation.
I would also observe and keep a record of everything that you son consumes (eats and drinks) to see if he has an allergy to some foods, like lactose, gluten, etc. His tummy may even hurt if he does not empty his bowels properly.
Best wishes